People who don't know what they're talking about shouldn't be posting! =\Some people get banned from GTS by doing the GTS cloning glitch.
There is also an emerald PC cloning glitch, but if you do it in reverse order, instead of cloning the pokemon, you delete the pokemon.
~!~Miss Cow~!~
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People who don't know what they're talking about shouldn't be posting! =\
Both of those sentences are wrong. There is NO way you can be banned from the GTS at all.
And there is no way that you can delete your Pokemon with the Emerald cloning glitch unless you used an Action Replay or something and did something stupid to your game.
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You probably will have some trouble reconnecting again for a few minutes though.
Actually, you can delete your pokemon. Instead of depositing, saving, and then withdrawing and talking to the lady like the usual way, if you deposit anything between the saving/withdrawl phrase, it won't get cloned but erased. No need to spazz out at people.
As for the banned thing, no. You probably will have some trouble reconnecting again for a few minutes though.